1.

Among KO_(2), AlO_(2)^(-),BaO_(2) and NO_(2)^(+) unpaired electron is present in

Answer»

`NO_(2)^(+)` and `BaO_(2)`
`KO_(2)` and `AlO_(2)^(-)`
`KO_(2)`
`BaO_(2)` only

Solution :`NO_(2)^(+), BaO_(2)` and `AlO_(2)^(-)` have even number of electrons whereas `KO_(2)` has ODD number of electrons


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